119575domain: NAppears in sequencesApply partial sum operator 4 times to Fibonacci numbers.at n=18A014166a(n) = T(2n+1, n+2), T given by A027948.at n=9A027954Number of second differences of arrays of length 5 of numbers in 0..n.at n=17A228220Number of integers of the form (x^4 + y^4) mod 3^n; a(n) = A289559(3^n).at n=11A367484